钢管混凝土柱排架-核心筒结构抗震性能研究  

A study on the seismic performance of concrete-filled steel tube column-steel shelf-concrete core tube structures

作　　者：曾繁良 黄炎生[1] 周靖[2] ZENG Fanliang;HUANG Yansheng;ZHOU Jing(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Subtropical Architecture Science,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《振动与冲击》2020年第12期190-197,共8页Journal of Vibration and Shock

基　　金：华南理工大学亚热带建筑科学国家重点实验室项目(2017KC18);湖南省自然科学基金(2017JJ3058,2018JJ2401)。

摘　　要：以钢管混凝土柱钢框架-核心筒结构为工程背景,将钢梁与柱、核心筒的节点修改为螺栓连接的铰接节点,制作1/40的缩尺结构模型进行振动台测试,研究结构的损伤特点、动力特性、最大侧向位移、层间位移角、扭转角、地震惯性力、楼层剪力和延性需求等。结果表明:震损出现在下部楼层的混凝土楼板与柱连接、楼板与核心筒连接、楼板与钢梁连接、核心筒角部等部位;基本自振周期和阻尼比随震损增加而增大,动力放大效应减小,长周期地震动反应较显著;核心筒最大层间位移角达1/26,超过规范框架-核心筒结构体系不倒塌限值3.8倍未出现倒塌;钢排架抗扭刚度小,结构扭转反应由核心筒主导;地震惯性力和楼层剪力受地震长周期分量的影响小,楼层延性需求差异大。Taking an actual concrete-filled steel tube(CFST)column-steel frame-reinforced concrete(RC)core-tube hybrid structure as a reference engineering example,a CFST column-steel shelf-core tube prototype structure was designed by changing the rigid joint of the steel frame beam to the column or core walls to the bolted joint.A 1/40 scaled model structure was constructed and performed the shaking table tests.The damage phenomena,dynamic characteristics,maximum lateral displacement,maximum inter-story drift angle,maximum torsion angle,seismic inertial force,story shear force,overturning moment and ductility demand of the structure were studied.The experimental results show that the damage occurs at the connection between the concrete slab and the column on the lower story,the connection between the concrete slab and the core wall,the connection between the concrete slab and the steel beam,and the corner concrete of the core tube walls.The basic natural vibration periods and damping ratios increase with the increase of the seismic damage,and the dynamic amplification effect decrease.The long-period ground motion response is more significant.The maximum inter-story drift angle of the core tube is 1/26,which exceeds 3.8 times of the collapse limit for the frame-core tube structure system,but the model structure has no collapse.The torsion stiffness of the outer steel shelf is small,and the structural torsion response is dominated by the core tube.The earthquake inertia force and story shear force of the structural damage are less affected by the long-period motion components.The ductility demand of story has a large difference.

关 键 词：钢管混凝土柱-钢排架-核心筒结构 铰接节点 振动台试验 抗震性能 

分 类 号：TU318[建筑科学—结构工程]